yes, my dd2 weighs less than 10kg, and is 2
She hasn't always been this small, but slowly dropped and dropped on the charts untils he fell off the bottom of them at about 9 months old. She hasn't really ever made it back onto the charts (occasionally just creeps over the border, but then slides back again)
She is fit, healthy as far as we can tll, eats like a horse, but the weight does not go on.
she is quite short too, although is on the charts for height.
If you are worried at all, do talk to your gp/hv but be prepared to get into a cycle of appointments which might not give you any answers, and at times can be very frustrating - like when a dietician tells me to get more calories into her, but when I filled out the chart for what is eaten and when (usually 3 days worth), I ran out of room to write down what is being eaten. The dietician was at the amount (and all decent, homecooked stuff, so no wasted calories) but could not sugggest anyhting to help...
dd2 has been under a paed now for nearly 18 months, with various investigations, and nothing has come back as concrete (there is family history of gut problems, and that is why we are investigating - generally speaking, a child who is eating as much as dd2 does should be putting on weight).